Senior Full-Stack Engineer

The Vault is a Swiss and EU-regulated fintech group building institutional-grade digital asset infrastructure. We’re looking for a Senior Full-Stack Engineer to own features end-to-end on our security-first, API-driven platform. You will build product features across Go and Node.js backends and a React (TypeScript) frontend, from domain modelling with DDD to dashboards, admin workflows and audit views. You’ll work with PostgreSQL and MongoDB, and you’ll own quality, observability and security basics such as RBAC and audit trails. AI coding tools like Cursor, Copilot or Claude Code are part of the daily workflow. We’re looking for someone with 7+ years of production experience with Go and/or the MERN stack and strong React skills, who uses DDD in practice and has solid PostgreSQL and MongoDB skills. Confident daily use of AI coding tools is a must. Experience with event-driven patterns, fintech or high-security systems such as custody or payments is a plus.